156 



EEPOliT OF THE 



No. 3 



One field crew of four men working over a period of four months eradicated 

 28,195 plants on an area of about 100 acres, while this area was abnormal and 

 contained more Eibes than usual it indicates the impossibility of carrying on 

 such work over large areas of wild land. 



For a number of years enquiries have been coming into the Department 

 regarding the diseased condition of white pine throughout the pine areas of 

 Northern Ontario. White pine has been our most important timber tree but it 

 seems to have many enemies. Following your advice the Forestry Branch is 

 making a special study of this problem. The whole policy of handling white 

 pine forests may be influenced by such a study. 



Following instructions from this Department, Dr. J. H, Faull, of the Uni- 

 versity of Toronto, a specialist in plant pathology has undertaken a special study 

 of these problems and you will find his preliminary report appended: 



6— Mixed plantation of Scotch Pine and Larch made in 1912 at the Provincial 



Forest Station. 



Preliminary Report of Dr. J. H. Faull: 



" The science of forest pathology deals with the health of the forest and 

 that of its products ; therefore, the forest pathologist is concerned with the Avelf are 

 of the standing timber and of the nursery, with the preservation from decay of 

 converted timber, with the prevention of discoloration in lumber and in pulp, 

 and with the exclusion of destructive foreign diseases. Some of the problems in this 

 field have been solved and the results made applicable with monetary advantage — 

 thus it has been discovered that decay is caused by fungi, and that ties, posts 

 and structural timber can be profitably treated so as to guard against the invasion 

 of these wood-destroying agents, further that discoloration in lumber and in 

 pulp is due to certain molds which can be warded off at slight expense, and 



